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參數(shù)資料
| 型號： | DAC8541EVM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DAC8541EVM(DAC8541評估板) |
| 中文描述： | DAC8541EVM（DAC8541評估板） |
| 文件頁數(shù)： | 22/26頁 |
| 文件大小： | 351K |
| 代理商： | DAC8541EVM |
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Host Processor Operation
3-4
Table 3-4.Capacitive Load Drive Output Jumper Settings
Reference
Jumper Position
Function
W3
2-3
Negative rail of the op amp tied to analog GND
W4
1-2
Positive rail supply of the op amp tied to 15 V
W5
3-4
Capacitive load drive output of DAC is channeled to the output terminals
W6
Open
Disconnect V
REF(H)
from negative input of op amp
Disconnect R8 (see Note)
W7
Open
Note:
If there is a need to incrementally adjust the capacitive load output, replace R8 with a capacitor with the desired capaci-
tance value and CLOSE W7.
3.2.4
Bipolar Operation Using the DAC8541 (Default Mode)
Although the DAC8541 is designed for single-supply operation, the bipolar
output of operation is implemented using the circuit shown in Figure 3-1. The
output of the circuit gives an output voltage range of
±
V
REF(H)
. The rail-to-rail
operation at the amplifier output is achievable using an OPA627 as the output
amplifier.
Figure 3-1. Bipolar Operation With the DAC8541
_
+
OPA627
15 V
-15 V
R2
10 k
V
OUT
SENSE
V
OUT
DAC8541
V
REF
H
V
REF
L
±
5 V
R1
10 k
0.1
μ
F
10
μ
F
V
REF
U2
U1
The bipolar configuration is accomplished by following the correct jumper
settings according to Table 3-5.
Table 3-5.Bipolar Operation Output Jumper Settings
Reference
Jumper Position
Function
W3
1-2
Negative rail supply of the op amp tied to -15 V
W4
1-2
Positive rail supply of the op amp tied to 15 V
W5
Close
Bipolar output of DAC is channeled to the output terminals
W6
Close
Connect V
REF(H)
to the negative input of op amp for negative biasing
Disconnect R8
W7
Open
An example in Figure 3-2 shows the sinusoidal signal in channel 1 being
amplified within the range of
±
V
REF(H)
shown in channel 2. The reference
voltage, V
REF(H)
, is set to 5 V, which is then supplied to the negative input of
U2 to bias the circuit to its negative rail. This provides an output of
±
5 V with
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| DAC8541Y/2K | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Low Power 16-Bit DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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